Vitiligo is an acquired, often familial, melanocytopenic disorder that produces focal depigmentation of the skin.
About half of the patients has onset of lesion before the age of 20.
It is a progressive disease wherein spontaneous repigmentation may occur within 6 months.
Precipitating factors include emotional stress, sunburn, chemical exposure, skin trauma, inflammation, irritation or rash that may precede the lesions by 2-3 months.
Lesions are white-colored macules or patches with well-defined borders and otherwise normal skin surface.

A 10-year retrospective study at Singapore General Hospital (SGH) has shown that majority of patients with tinea unguium, a common nail infection, are aged ≥60 years. In this cohort, patients of Indian and other ethnicities are over-represented for tinea unguium compared to Chinese and Malay patients.